An experiment consists of four outcomes with p(e1) = 0.2, p(e2) = 0.3, and p(e3) = 0.4. the probability of outcome e4

 0.1

Step-by-step explanation:

WE know that the total probability in an experiments = 1.

i.e. Sum of the probabilities of occurring each event is 1.

i.e. If there are n outcomes in any experiment., then the total probability will be:

Given : An experiment consists of four outcomes ,with P(E1) = 0.2, P(E2) = 0.3, and P(E3) = 0.4.

Then ,

Substitute corresponding values , we get

Hence , the probability of outcome is 0.1.

thats not a system of equations, that is a solution